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e) To “prime” charge pump, loosen two hex socket head capscrews (shown
in Figure 7)
1-1/2 turns only.
Make sure engine is not running.
Lift
charge pump housing upward and wait for a steady flow of oil to flow out
from under housing.
Retighten capscrews
. Do this for both pumps.
Note: Hydraulic reservoir can be pressurized to up to 5 psi to speed this
process.
f) If either drive wheel still does not rotate, stop and repeat steps (d)
through (e) above for the respective pump. If wheels rotate slowly, the
system may prime after additional running. Check oil level as stated in
Section 5.1.8.
g) Allow unit to run several minutes after the charge pumps are “primed”
with drive system in the full speed position. Check oil level as stated in
Section 5.1.8.
h) Check hydro drive linkage adjustment as stated in Section 5.2.9.
5.1.11 Check tire pressures.
Service Interval:
40 hrs.
a) Stop engine and remove spark plug wire(s). Check air pressure in tires;
recommended tire pressure is: rear,
12 -16 psi;
pneumatic casters,
22 psi.
b) Inflate tires to pressures stated above. Measure circumference of each
drive tire. Adjust tire pressures within above range to try to make the
circumferences match as closely as possible.
NOTE: Front caster tires have permanent tire sealant installed.
5.1.12 Inspect Belt wear.
Service Interval:
40 hrs.
a) Stop engine and remove spark plug wire(s).
b) Remove cutter deck belt shield to check mower primary and secondary
(48” decks) belt condition.
c) Look under engine deck to check the pump drive belt condition.
d) Check all idler arms to be sure they pivot freely. Disassemble, clean and
grease pivot bushings if necessary.
5.1.13 Lubrication
Service Interval:
Refer to Chart.
a) Stop engine and remove spark plug wire(s).
b) Lubricate fittings with one to two pumps of SAE No. 2 multi-purpose gun
grease
.
Refer to the following chart for fitting locations and lubrication schedule.
GREASE LUBRICATION CHART
FITTING
LOCATIONS
INITIAL
PUMPS
QUANTITY
36” 48”
SERVICE
INTERVAL
1. Caster Wheel Bearings 12 2 2 Daily
2. Caster Pivots 2 2 2 Daily
3. Blade Engagement Lower Bellcrank 1 1 1 Monthly
4. Idler Pivot (Pump Drive) 2 1 1 Weekly
5. Pump Control Bearings 2 2 2 Weekly
6. Cutter Deck Idler Pivot 2 1 1 Weekly